CN101353481A - Asphalt mixture for rapid repair of hot-mix-cold-laid pavement - Google Patents

Asphalt mixture for rapid repair of hot-mix-cold-laid pavement Download PDF

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CN101353481A
CN101353481A CNA2007100442011A CN200710044201A CN101353481A CN 101353481 A CN101353481 A CN 101353481A CN A2007100442011 A CNA2007100442011 A CN A2007100442011A CN 200710044201 A CN200710044201 A CN 200710044201A CN 101353481 A CN101353481 A CN 101353481A
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percent
asphalt
pass
cold
sieve aperture
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CNA2007100442011A
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凌建明
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同济大学
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Abstract

The invention relates to a road restoration asphalt mixture, and discloses a hot-mixing cold-paving road restoration asphalt mixture which comprises modified asphalt, additives and aggregates, wherein, the additives include a diluent, petroleum resin and an anti-stripping agent, the aggregates include coarse aggregate, fine aggregate and mineral powder. While preparing liquid asphalt, using the weight of the modified asphalt as reference, the weight proportion of the diluent is 14 percent to 22 percent, the weight proportion of the petroleum resin is 1.8 to 2.2 percent and the weight proportion of the anti-stripping agent is 0.4 to 0.6 percent. The asphalt mixture of the invention has strong comprehensiveness, performs excellently in poriness, compactibility, initial strength, workability, the strength of formed mixture, anti-water damage property and storage property, can be mixed easily and operated conveniently and is suitable for practical application and generalization.

Description

Asphalt mixture for rapid repair of hot-mix-cold-laid pavement
Technical field
The face that the present invention relates to is repaired asphalt, is specifically related to a kind of hot-mix-cold-laid road face and repairs asphalt.
Background technology
The road face is the topmost Infrastructure in movement area, airport, and vital tasks such as bearing takeoff and landing, slide and parking is the basic platform that the airport function is given full play to.But, because the effect repeatedly of load factor and environmental factors, road face structure in use can produce damage gradually, as the various fractures of cement concrete road surface, plate body fragmentation, seam fragmentation, seam sealer damage, hole, hole, repair damaged etc., loose, the crack of asphalt concrete pavement, rut, hole, hole, depression etc.Some of airstrip damaged the service performance that mainly influence face, and some flight safety of damaging then directly aircraft constitutes a threat to, its consequence than the road surface well damage of common road or urban road many, so must in time be repaired.
Yet, fast repair technique from present China airstrip, no matter for cement concrete road surface or asphalt concrete pavement, all there are many weak points at aspects such as repair materials, equipment, technologies, are difficult to satisfy the air transportation of airport sustainable growth the technical requirements of reparation fast of road face.
At present, bituminous concrete runway in China airport damages the two kinds of measures of mainly taking of repairing: hot asphalt mixture reparation and cold laid asphaltic compound are repaired.The hot-mix-cold-laid asphalt is with the pitch of special preparation and gathers materials and mix and stir that form a kind of loose condition (of surface) that is at normal temperatures, the pack back easily stores, and can keep in repair the asphalt that uses for the road face at any time under hot.The hot-mix-cold-laid asphalt is as a kind of special compound, and its principle of work and method of design and heat are mixed hot petrolize compound and both had points of resemblance, again difference to some extent.
Heat is mixed hot petrolize compound and is used for the face damage reparation of large-area slightly road, repair is carried out during suspend night, do not delay navigation in second day, but, only be applicable to the road face maintenance engineering that concentrate relatively the position, quantities is bigger usually because common hot-mix asphalt mixture stirs, compacting must guarantee very high temperature; And big to dispersiveness, the road face repairing work that quantities is little is very inconvenient, especially at winter-spring season and sleety weather, is subjected to the restriction of temperature bigger.Mix system and repair used hot-mix asphalt mixture at present by artificial scene, many construction parameters such as asphalt temperature, asphalt content, mix and stir very difficult controls such as temperature, uniform mixing also is difficult to guarantee, it is shorter to cause road face performance after the repairing to hold time, and the road face after the reparation easily damages repeatedly.Therefore, the emergency first-aid repair of the sudden damage as runway road, Hongqiao International airport face often adopts the cold laid asphaltic compound.But at present the used cold-application material in airport costs an arm and a leg mostly, and result of use is also not fully up to expectations, only plays the effect of filling up the hole, hole, can't compacting, knot is hard, and aircraft is pushed phenomenon through producing later.
Domestic some hot-mix-cold-laid asphalts that occurred, as Hong Kong " it is logical that peace is mended the road admittedly " and homemade " section is peaceful " cold laid asphaltic compound, but because the defective on the repair materials performance, road face after the reparation often can only be kept the very short time and damage again, particularly only can keep 1~2 hour, and the use properties of reparation road face can't get a desired effect in the rainy day.Adopt full thickness to repair during maintenance, operating process comprises milling, spill oil, pave, roll etc.Also there is the asphalt product of some hot-mix-cold-laids in states such as Britain, Canada, Japan, but prescription is unknown mostly, and different defectives is arranged on the use properties.
Summary of the invention
The technical requirements that the present invention repairs fast according to the airport asphalt concrete pavement provides a kind of novel hot-mix-cold-laid asphalt of high comprehensive performance, and what can be used for pitch road face or cement road face should acute repairing and asphalt concrete pavement ordinary maintenance.
The present invention has adopted following technical proposals:
A kind of asphalt mixture for rapid repair of hot-mix-cold-laid pavement, by modifying asphalt, additive with gather materials and form, additive comprises thinner, petroleum resin and antistripping agent, gather materials and comprise coarse aggregate, fine aggregate and breeze, during obtaining liq pitch, be benchmark with the weight of modifying asphalt, the thinner weight percent is 14%-22%, the petroleum resin weight percent is 1.8-2.2%, and the antistripping agent weight percent is 0.4%-0.6%.
The cold laid asphaltic compound mainly is made up of mineral aggregate (promptly gathering materials), pitch and breeze, and its performance and bituminous adhesive property are closely related: the one, and the adhesive attraction between pitch and mineral aggregate, its adhesivity directly influences the intensity and the water stability of compound; The 2nd, whether easily whether loose the mutual cohesive action between the pitch of different mineral aggregate particle surfaces be related to compound, compacting and intensity size.So the cold laid asphaltic compound is to be the bonding system of binder with pitch in essence, asphalt viscosity will be directly connected to sponginess, compactibility, initial strength and the workability of compound.
During the asphalt preparation, earlier basic asphalt and additive are mixed and made into eu-bitumen, then carry out the system of mixing of compound.It is all unfavorable that the too high and low excessively performance to compound of eu-bitumen viscosity is brought into play.Adopt the compound of low viscosity pitch preparation, though sponginess and workability are all good,, cause the surface layer initial stage cohesive force of institute's making little because the cohesion between the pitch is very little, be not enough to resist the shearing stress that the effect of aircraft wheel load produces, cause the loose of compound easily.Suitably increase the intensity that asphalt viscosity can improve compound, make it to be difficult for being rubbed scattered by wheel.But when asphalt viscosity is excessive, compound in process of cooling or temperature form lump when higher easily, the mineral aggregate surface pitch under normal temperature condition is mobile poor, the diffusibility between the molecule weakens greatly, is unfavorable for compacting, and workability is also poor when mixing and stirring.Be sponginess and the intensity of taking into account compound, select to be easy to the asphalt cement material that constructing operation can guarantee sponginess again that test shows that the normal viscosity of eu-bitumen can be controlled in C 5 60In=100~300s scope.In view of the temperature sensibility of bituminous material, when temperature is higher, get high value, temperature is lower or get middle low value when storing for a long time.
The viscosity of eu-bitumen is by its moiety control.The prescription that key of the present invention has been to provide a kind of new eu-bitumen to prepare burden, thus make the over-all properties of asphalt increase.Prescription comprises several key elements, has at first adopted the basic asphalt of modifying asphalt as eu-bitumen, secondly, adopts thinner, petroleum resin and antistripping agent as its additive simultaneously, and the 3rd, be exactly the percentage composition of various additives.
Adopt modifying asphalt can improve the temperature sensitivity and the adhesive property of bituminous material, the cold-application material can both be used under high temperature, bad climate condition such as rainy well, the present invention can adopt conventional modifying asphalt, as SBS, SIS modifying asphalt, and wherein preferred SBS modifying asphalt.When adopting modifying asphalt, the viscosity of its fluxed asphalt is improved, and can be controlled in C 5 60In=200~400s scope.The pitch label can be determined according to the weather condition of this compound territory of use, as above Haiti district should be the basic asphalt of 60-80 with penetration degree, it is the pitch of 80-100 that penetration degree should be adopted in the Beijing area, the pitch label of cold-application material should be consistent with hot-mix asphalt mixture, this is because after the road face structure complete when the volatilization of the thinner in the compound, that formation is stable, both pavement performances are wanted basically identical.
Adopt thinner, petroleum resin and antistripping agent can improve the over-all properties of hot-mix-cold-laid asphalt as its additive simultaneously, the effect division of various additives is as follows:
In basic asphalt, add thinner and can guarantee the noncondensing at normal temperatures one-tenth piece of cold-application material in order to reduce bituminous viscosity.The polarity solution similar to pitch all can be used as thinner, as gasoline, kerosene or diesel oil.Consider that the cold laid asphaltic compound need store long time, so the slow diesel oil of the preferred evaporation rate of thinner of the present invention.
Consider that pitch viscosity after diluting can reduce significantly, the present invention adds a small amount of petroleum resin to improve its performance in pitch, petroleum resin are C5, C9 fractions of petroleum cracking institute by-product, a kind of thermoplastic resin through explained hereafter such as pre-treatment, polymerization, distillations, it is not a superpolymer, but molecular weight is between the oligopolymer of 300-3000.It has, and acid number is low, and compatibility is good, and characteristics such as water-fast, anti-ethanol and chemicals-resistant have chemically stable to soda acid, and the characteristics of regulating viscosity and Heat stability is good are arranged.From embodiment as can be seen, behind the modifying asphalt admixture petroleum resin, the bituminous performance has obtained tangible improvement.
Simultaneously, for improving the adhesive capacity of pitch and mineral aggregate, pitch is peeled off from surface of aggregate when preventing the rainwater infiltration, strengthens the water stability of compound, also should add antistripping agent, requires to select for use thermostability and the good antistripping agent of resistance to deterioration among the present invention.
The percentage composition of every kind of additive can directly influence the over-all properties of eu-bitumen, grope through experiment, as its additive, weight with modifying asphalt is benchmark, the thinner weight percent is 14%-22%, the petroleum resin weight percent is 1.8-2.2%, when the antistripping agent weight percent is 0.4%-0.6%, can obtain good comprehensive properties hot-mix-cold-laid asphalt.
Further preferred, be benchmark with the weight of modifying asphalt, the thinner weight percent is 18%, and the petroleum resin weight percent is 2%, and the antistripping agent weight percent is 0.5%.The asphalt over-all properties that obtain this moment is put up the best performance.
Additive in the eu-bitumen of the present invention comprises but is not limited to thinner, petroleum resin and antistripping agent; according to content disclosed by the invention; those skilled in the art also can be by increasing other conventional additives; prescription to eu-bitumen of the present invention on basis of the present invention is further improved; be added into other additive commonly used; as siccative, asphalt modifier, but this all belongs within protection scope of the present invention.
Certainly, except asphalt viscosity, some factors can influence the over-all properties of asphalt in addition, as factors such as asphalt membrane thickness, the grating of gathering materials, breeze consumptions.Need they are made general equilibrium during the compound design, can further improve the performance of asphalt.
The improvement of first aspect: the bitumen aggregate ratio that adopts 4.9%-5.1%.
Oil in the bitumen aggregate ratio is meant eu-bitumen, and stone refers to gather materials, in the present invention, the weight sum that bitumen aggregate ratio is modifying asphalt and additive than on the weight sum of gathering materials, formulate is as follows:
Bitumen aggregate ratio=(modifying asphalt weight+weight of additive): (coarse aggregate weight+fine aggregate weight+breeze weight)
Bitumen aggregate ratio decision asphalt membrane thickness, and asphalt membrane thickness directly has influence on a series of performances such as the sponginess, compactibility, intensity, water stability of compound.When excessive, asphalt membrane thickness is big with oil mass, and the area that contacts between the pitch of mineral aggregate surface is bigger, and compound lumps easily; When asphalt content was moderate, asphalt membrane thickness was less, even its viscosity is very low, also can produce higher cohesive action.Therefore the cold laid asphaltic compound to mix hot petrolize compound with oil mass heat commonly used few.But when asphalt content was very few, the mineral aggregate surface can not be wrapped up in attached and loose easily fully by pitch.Therefore, for obtaining sponginess and compactibility preferably simultaneously, must strict control asphalt membrane thickness.In addition, the intensity of cold-application material rises to a certain maximum with oil film thickness, just begins afterwards to descend, and therefore has the best oil mass.Under the prerequisite that satisfies sponginess, compactibility and requirement of strength, strengthen asphalt content, by mineral aggregate gradation and breeze consumption are adjusted, can reduce the voidage of cold laid asphaltic compound again, thereby improve water stability.
With reference to the experimental formula of California, USA, can calculate the oil film thickness of mineral aggregate particle surface according to the grating of the bitumen aggregate ratio of compound and mineral aggregate, its calculation formula is as follows:
D=m×48.74/(2+0.02a+0.04b+0.08c+0.14d+0.3e+0.6f+1.6g)(4-1)
In the formula: D---asphalt membrane thickness (μ m);
M---bitumen aggregate ratio (%);
A, b, c, d, e, f, g is respectively 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, the 0.075mm sieve aperture pass through percentage.
The some kinds of calculating with cold-application material of good sponginess and compactibility are shown that asphalt membrane thickness is advisable in the scope of 4.5~6.5 μ m.The breeze consumption should be got high limit after a little while, otherwise gets lower bound.When the system compound is mixed at the scene in enormous quantities, should adjust bitumen aggregate ratio, find out the best oil mass according to different gather materials feature and gratings.At first according to formula and recommendation oil film thickness 5.5 μ m, the best oil mass of using of estimation, then in up and down 1.5% the scope of the best with oil mass, adopting respectively to differ the compound that 0.25% oilstone is recently mixed system different pitches consumption, is the boundary of asphalt content caking or too dry not to occur significantly perhaps.The sponginess of the asphalt that makes is mixed in observation, tests intensity after the compacting, select sponginess and compactibility all the usefulness oil mass better the time finally use oil mass as compound.
Experiment shows, adopts the bitumen aggregate ratio of 4.9%-5.1%, can obtain the oil film thickness of ideal 4.8~6.4 μ m.
Further preferred, bitumen aggregate ratio is 5.0% o'clock, and proterties the best of compound is loosely organized and the incipient stability degree is higher, is 6.0kN.
The improvement of second aspect: choose suitable gathering materials and grating.
The intensity of asphalt depends on the cohesion between the crowded power of the embedding between the mineral aggregate and inner frictional resistance and pitch and the mineral aggregate.Owing to the asphalt viscosity that the cold laid asphaltic compound is used is relatively low, the cohesion between pitch and the mineral aggregate is less, and power and inner frictional resistance are squeezed in the embedding that the early strength of cold laid asphaltic compound depends primarily between the mineral aggregate.Thereby the character of gathering materials has material impact to the intensity of cold-application material.
Gathering materials to have enough intensity and hardness, should select hydrophobic in nature and alkaline building stones for use, as limestone, basalt etc.Coarse aggregate should clean, dry, particle is cubes, surface irregularity and be rich in corner angle; Fine aggregate should be hard, grating is good, shape is near cubes, clean inclusion-free; Breeze requires to have less hydrophilic coefficient (hydrophilic coefficient is less than 1).
Preferably, gather materials and select hydrophobic in nature and alkaline building stones for use, the grating such as the following table of gathering materials are listed:
It is the weight percent of benchmark that above-mentioned per-cent is with the gross weight of gathering materials.
Usually saying gathers materials comprises coarse aggregate (particle diameter is greater than 2.36mm), fine aggregate (particle diameter is greater than 0.075~2.36mm) and breeze (particle diameter is less than 0.075mm)
Best, coarse aggregate is selected basalt for use, and fine aggregate is selected limestone for use, grating of gathering materials such as following table:
The improvement of the third aspect: breeze is selected alkaline breeze for use, and breeze weight accounts for 10~15% of the gross weight of gathering materials.
Breeze is particle diameter gathering materials below 0.075mm, and the consumption of breeze can influence sponginess, compactibility and the intensity of compound:
Influence to the compound sponginess: the sponginess of compound depends primarily on the thickness of asphalt film on the compound mineral aggregate particle.When increasing asphalt membrane thickness, free pitch increases, when compound stores between the pitch of particle surface contact area can increase, bonding produces big caking easily.Owing to increase the content of breeze in the compound specific area of mineral skeleton is increased greatly, and be unlikely to significantly to increase the voidage of compound, can make high compact and watertightness after compound obtains sponginess, compacting preferably so suitably increase the breeze consumption.
Influence to the compound compactibility: the breeze consumption is very little the time, and the viscosity of the asphalt mastic that breeze and pitch form is lower, mineral aggregate can not be bondd well.When breeze is too many, can make compound too dry and astringent again, influence pitch with gather materials wrapping and adhering to.Be subjected to the restriction of rolling compaction machine function simultaneously, compound also is difficult to compacting.Facts have proved, between pitch and breeze, have certain ratio, and when they when content reaches certain value in compound, compound is easy to compacting.Too much or the very few compound compacting difficulty that all can make of breeze, compactness can not get guaranteeing.
Influence to compound intensity: the intensity of compound increases with the increase of breeze consumption.Along with the increase of breeze consumption, the mineral aggregate specific area increases and particle binding site quantity increases severely, and more pitch becomes the structure pitch of thin layer, has bigger cohesive force, and is especially bigger in this cohesive action in particle binding site place.Therefore, in some cases,, can suitably increase the consumption of breeze for obtaining sponginess and intensity preferably.
The Marshall stability test shows, breeze weight accounts for when gathering materials gross weight 6%, (promptly can satisfy the requirement of sponginess and compactibility) maximum incipient stability degree that compound can reach is 4.6kN only, and the breeze consumption is 15% o'clock, its value is up to 7.3kN, increase the intensity that the breeze consumption helps improving compound in right amount, workability when mixing system for taking into account intensity and compound, cold-application material as road face reparation usefulness, the preferred alkaline breeze of breeze, as the Wingdale ground blast furnace slag, consumption should be controlled in 10~15% scopes.
Process for preparation when hot-mix-cold-laid asphalt of the present invention uses is as follows:
Earlier modifying asphalt and additive are mixed and made into eu-bitumen by a certain percentage, then carry out the system of mixing of compound, mix the system step and follow following requirement and program:
(1) heated and stirred in a certain amount of agitation vat that adds 110~120 ℃ that gathers materials is even.
(2) eu-bitumen (having added admixture) with accurate weighing is heated to 90~100 ℃, adds in the agitation vat again and the uniform mixing of gathering materials.Because the cold laid asphaltic compound is less relatively with oil mass, and the breeze consumption is more, must force to mix and stir, be attached to the mineral aggregate surface to guarantee that pitch evenly, is fully wrapped up in.Therefore, need to adopt compulsory mixer to mix and stir.
(3) add breeze, mix and stir to even no grey material and get final product.
(4) the asphalt tiling should be spread out after the discharging, naturally cooling, and stirred, in order to avoid compound condenses into piece, sealing pack when treating its temperature near normal temperature. in good time
Compared with prior art: asphalt of the present invention is in sponginess, compactibility, initial strength, workability, the intensity of compound, anti-water damage property, storge quality all show good after the moulding, and the system of mixing easily, easy and simple to handle, price advantage is obvious, and over-all properties is greatly improved.
Embodiment
Increase petroleum resin in embodiment 1 eu-bitumen and improve asphalt performance
The petroleum resin (available from Shenxian County, Shandong Province blue shield chemical industry company limited) of admixture 2% in PG-70SBS modifying asphalt (available from Zhenjiang Ke Shi asphaltic products. company limited) (is the weight percentage of benchmark with modifying asphalt weight), penetration of bitumens, softening temperature and ductility before and after the test admixture (carrying out according to the method that existing " highway engineering pitch and asphalt testing regulation " (JTJ052-2000) stipulated) detect the bituminous performance.
Find out that by table behind the petroleum resin of admixture 2%, the bituminous performance has obtained tangible improvement.
The test of embodiment 2-6 eu-bitumen adhesivity
With modifying asphalt weight is benchmark, adopts following weight percent content recipe configuration eu-bitumen (weight that percentage composition is with modifying asphalt is the weight percentage of benchmark):
Antistripping agent: the Shanghai TJ066 asphalt anti-stripping agent that material Science and Technology Ltd. produces of going the same way.
Selection meets gathering materials and breeze of " civil airport asphalt concrete pavement design specifications " (MH 5010-1999) technical requirements.
Wherein coarse aggregate is a basalt, and fine aggregate is a limestone, and aggregate grading is as follows:
At first the general is an amount of slightly during preparation, fine aggregate stirs and be heated to 110-120 ℃; The PG-70SBS modifying asphalt is heated to 150 ℃ then, adds load weighted thinner, antistripping agent, petroleum resin then, makes eu-bitumen behind stirring 15~20min, and accurately the weighing bitumen aggregate ratio is 5.0% eu-bitumen (having added admixture) and gathers materials; Elder generation overstriking, fine aggregate stir, and add breeze again, mix and stir to even no grey material and get final product discharging.Stirred after the discharging in good time, and be blown into freezing air make it the cooling, in order to avoid compound condenses into piece, pack when treating its temperature near normal temperature.
For checking the adhesivity of this eu-bitumen to coarse aggregate, measure the anti-water peel-ability of surface of aggregate bituminous according to " highway engineering pitch and asphalt testing regulation " water-boiling method in (JTJ052-2000), gather materials and select basalt for use, the asphalt membrane of observation surface of aggregate keeps intact behind the poach, wherein the pitch area peeled off by boiling water of embodiment 6 is almost 0, and evaluation all liquid pitch is 5 with the adhesivity grade of gathering materials.And the eu-bitumen according to observation embodiment 2-6 all has good toughness and elasticity.
The selection experiment of embodiment 7 breeze consumptions
Select the eu-bitumen prescription of embodiment 6, (MH5010-1999) technical requirements gather materials and breeze to select to meet " civil airport asphalt concrete pavement design specifications ".
Wherein coarse aggregate is a basalt, and fine aggregate is a limestone, and grating is as follows:
Adopt the method for embodiment 6 to make eu-bitumen, then carry out the system of mixing of compound:
(1) it is even an amount of coarse aggregate and fine aggregate to be added in 110~120 ℃ the agitation vat heated and stirred.
(2) the gather materials breeze of total amount 6%, 10%, 15% of weighing respectively.
(3) at different breeze consumptions, corresponding with accurate weighing bitumen aggregate ratio is, and 5.0% eu-bitumen (having added admixture) is heated to 90~100 ℃, add in the agitation vat again and the employing compulsory mixer uniform mixing of gathering materials, add load weighted breeze at last and mix and stir to even no grey material.
(4) the asphalt tiling should be spread out after the discharging, naturally cooling, and stirred, in order to avoid compound condenses into piece, sealing pack when treating its temperature near normal temperature. in good time
The compound of different breeze consumptions detects its Marshall stability after the hammering moulding under 15 ℃ condition.The method that the testing method of Marshall stability adopts " highway engineering pitch and asphalt testing regulation " (JTJ052-2000) to put down in writing is carried out.Test result is as follows:
Breeze consumption % ??6 ??10 ??15
Incipient stability degree (kN) ??4.6 ??5.8 ??7.3
The stability of compound can reflect the size of intensity indirectly, as seen from the above table, breeze is only 4.6kN of 6% compound (promptly can satisfy the requirement of sponginess and compactibility) the maximum incipient stability degree that can reach, and the breeze consumption is 15% o'clock, its value increases the intensity that the breeze consumption helps improving compound in right amount up to 7.3kN, the workability when mixing system for taking into account intensity and compound, as the cold-application material of road face reparation usefulness, the breeze consumption should be controlled in 10~15% scopes.
The selection experiment of embodiment 8 bitumen aggregate ratios
Select the eu-bitumen prescription of embodiment 6, and meet " civil airport asphalt concrete pavement design specifications " (MH5010-1999) gathering materials and breeze of technical requirements, wherein coarse aggregate is a basalt, and fine aggregate is a limestone, and grating is as follows:
Get optimum oil film thickness 5.5um, the calculating optimum bitumen aggregate ratio is 5.5%, and 4.75% (the breeze consumption is 12.5% of the gross weight of gathering materials, down together), 5.0%, 5.25%, 5.5%, 6.0% 5 kind of bitumen aggregate ratio are adopted in test.
Adopt the method for embodiment 6 to make eu-bitumen, then carry out the system of mixing of compound with the method for embodiment 7.
The performance of asphalt can be judged simply by following method: compound should be rarefaction at normal temperatures, but during with hand-tight holding, it is agglomerating to bond; The initial Marshall stability of test mixing material is to judge the early strength of material.The result is as follows:
As can be seen from the above table, when bitumen aggregate ratio is 5.0%, proterties the best of compound, loosely organized and the incipient stability degree is higher, be 6.0kN.
Embodiment 9 oil film thicknesses relatively
Get the eu-bitumen of embodiment 2-6, embodiment 8 gathers materials and breeze, and adopt 4.9% respectively (the breeze consumption is 12.5% of the gross weight of gathering materials, down with), 5%, 5.1% bitumen aggregate ratio is with the method configuration asphalt of embodiment 8.And compare with the oil film thickness of existing various asphalts.
The method of test oil film thickness adopts the Calculation of Oil Film Thickness experimental formula of California, USA to calculate.
The result is as follows:
The every performance test of embodiment 10 hot-mix-cold-laid asphalts of the present invention
Get the eu-bitumen of embodiment 6, embodiment 8 gathers materials and breeze, 5% (the breeze consumption be gather materials gross weight 12.5%) bitumen aggregate ratio, with the method for embodiment 8 configuration asphalt.
(1) sponginess and compactibility
Judge the sponginess and the compactibility of compound according to engineering experience: at first observe the cold-application material and have or not caking, whether if caking is arranged, it is loose easily to lump; With hand compound is clutched then, unclamping the back compound can be agglomerating, shows then that compound can be compacted moulding and not loose, has good compactibility; Agglomerating compound is slightly firmly flapped, and compound just can scatter, and shows that then the compound sponginess is good.After tested, the asphalt sponginess and the compactibility of the preparation of this example are all good.
(2) initial strength
Get (meeting 63.5 ± 1.3mm with the test specimen height is standard) about cold laid asphaltic compound 1kg, each hammering of pros and cons 75 times after the demoulding, is measured Marshall stability.
The initial Marshall stability of asphalt of this example preparation reaches 6.0kN, greater than the recommended value 5.0kN of technical requirements.The early strength height also compactibility of side light material is good.
(3) intensity of compound after the moulding
Get compound and in 120 ℃ of baking ovens, dried by the fire 4 hours, make the volatilization of its lightweight oil content, moulding marshal piece then, the mensuration Marshall stability is 15.6kN, much larger than index recommended value 4.0kN.Even if it also is quite high that this intensity is compared with hot-mix asphalt mixture, the intensity of having reacted after this cold-application material moulding is higher.
(4) anti-water damage property
With 75 shaping test pieces of cold laid asphaltic compound each hammering of two sides at normal temperatures, the 3d that then test specimen soaked stands the practical situation of 3d rainwater effect with the simulated field compound.Under 15 ℃ of temperature, measure Marshall stability, calculate the residual stability of compound with following formula:
C = S 1 S 2 × 100 % - - - ( 4 - 2 )
In the formula: C---residual stability;
S 1---former test specimen stability;
S 2---test specimen stability behind the immersion 3d.
Test moulding marshal piece at normal temperatures, the stability that records after three days of soaking is 5.4kN, be do not soak test specimen Marshall stability 90%, promptly residual stability is 90%, illustrates that compound has good initial stage water stability.Be the further anti-water damage property of checking compound, this compound is carried out the freeze thawing split test, marshal piece is through behind the freeze-thaw cycle, cleavage strength be not the freeze thawing test specimen 75%.Greater than the water stability standard (〉=70%) of highway pavement to asphalt.
(5) storge quality
Cooled compound packed into to be stored in the bag, and the Marshall stability that records behind the 14d is 6.2kN, and the Marshall stability of 28d is 6.3kN, and the Marshall stability of 60d and 180d is 6.3kN; And behind the 180d, judge that according to the observation the sponginess of compound, compactibility are still good.The cold-application material that this material composition and proportioning are described is after storage for some time, and performance variation is little, and stable storing performance is preferably arranged.
Embodiment 11 hot-mix-cold-laid asphalts of the present invention compare with the performance of existing several cold-repairing materials
The normal temperature modified solid drop soil of TCK high-performance (being called for short the solid drop soil of TCK) that asphalt that embodiment 10 is made and Canadian TCK company produce, the peaceful cold-repairing material of section that the Hongqiao International airport uses at present and the cold laid asphaltic compound of this project development carry out the comprehensive comparison of technical feature aspect.
The detection method of various indexs is carried out by the method that China's existing " highway engineering pitch and asphalt testing regulation " (JTJ052-2000) stipulates.
As seen from the above table, than other several cold-repairing materials, the cold-application material performance that this project is developed is more superior.
Embodiment 11 actual use tests
Repair Hongqiao International airport, Shanghai K6 Taxiway Link: the asphalt of repairing field by using embodiment 10, construction adopts cutting machine wanting repairing area to cut into regular shape, cut with pneumatic pick then, the degree of depth is about 15cm, with the bottom surface and after cell wall is cleaned out all around, the brushing cement paste is made binding agent, pour into the quick hardening sulphoaluminate cement concrete of newly mixing to scale then, vibrate, wipe one's face and watering maintenance in time in 3 hours, have airplane wheel to grind behind the open flight of m seq (maintenance 3 hours), observation shows that repairing face is excellent.Repair the road face and use after 10 months, quality is still better, a small amount of hair shape crackle only occurs, and good with the old concrete bonding.
Repair highway: the test road is a bituminous concrete pavement, and central authorities have an area to be about 0.1m in the inner row track of test section 2, the degree of depth is about the hole groove of 15cm, and test in place adopts the cold laid asphaltic compound of embodiment 10 to cheat groove and fills up the formula reparation.To cheat that reamer removes, after the finishing, cleaning, making cold-application material, and artificial compacting.Be transported to the working-yard after the sealed storage of asphalt through 1 week, compound does not have caking phenomenon, and sponginess and compactibility are good.Repair in back 1 year half time, the baptism of the effect of traffic loading and high temperature, rainwater weather has been stood on the road surface, still maintains a good state, and does not have threshing, phenomenon such as loose, has obtained good effect.
The damage statistics that Hongqiao International airport, Shanghai cement concrete road surface and asphalt concrete pavement are taken place is as follows.These damage and almost all to adopt the material that the present invention develops, develops and the operating technique of proposition to repair fast.Through the long-term observation of applying unit, the actual effect that repair many places is good, has reached the requirement that airstrip is repaired fast fully.
The road face of 2004.8~2006.2 generations in Hongqiao International airport damages repairs statistics

Claims (10)

1. asphalt mixture for rapid repair of hot-mix-cold-laid pavement, it is characterized in that, described asphalt is by modifying asphalt, additive and gather materials and form, and wherein, additive comprises thinner, petroleum resin and antistripping agent, gather materials and comprise coarse aggregate, fine aggregate and breeze, during obtaining liq pitch, be benchmark with the weight of modifying asphalt, the thinner weight percent is 14%-22%, the petroleum resin weight percent is 1.8-2.2%, and the antistripping agent weight percent is 0.4%-0.6%.
2. asphalt mixture for rapid repair of hot-mix-cold-laid pavement according to claim 1 is characterized in that, during obtaining liq pitch, weight with modifying asphalt is benchmark, the thinner weight percent is 18%, and the petroleum resin weight percent is 2%, and the antistripping agent weight percent is 0.5%.
3. asphalt mixture for rapid repair of hot-mix-cold-laid pavement as claimed in claim 1 or 2 is characterized in that described modifying asphalt is the SBS modifying asphalt.
4. asphalt mixture for rapid repair of hot-mix-cold-laid pavement as claimed in claim 1 or 2 is characterized in that described thinner is the polarity solution similar to pitch.
5. as asphalt mixture for rapid repair of hot-mix-cold-laid pavement as described in the claim 4, it is characterized in that described thinner is a diesel oil.
6. as asphalt mixture for rapid repair of hot-mix-cold-laid pavement as described in arbitrary claim in the claim 1,2,5, it is characterized in that the bitumen aggregate ratio when compound is mixed system is 4.9%-5.1%.
7. as asphalt mixture for rapid repair of hot-mix-cold-laid pavement as described in the claim 6, it is characterized in that, compound mix system the time bitumen aggregate ratio be 5.0%.
8. as claim 1,2,5, the described asphalt mixture for rapid repair of hot-mix-cold-laid pavement of arbitrary claim in 7, it is characterized in that, described gathering materials is hydrophobic in nature and alkaline building stones, aggregate grading is: 13.2mm sieve aperture correspondence 95~100% percent of pass, 9.5mm sieve aperture correspondence 75~95% percent of pass, 4.75mm sieve aperture correspondence 60~75% percent of pass, 2.36mm sieve aperture correspondence 45~60% percent of pass, 1.18mm sieve aperture correspondence 35~45% percent of pass, 0.6mm sieve aperture correspondence 25~35% percent of pass, 0.3mm sieve aperture correspondence 21~26% percent of pass, 0.15mm sieve aperture correspondence 15~20% percent of pass, 0.075mm it is the weight percent of benchmark that sieve aperture correspondence 10~15% percent of pass, above-mentioned per-cent are with the gross weight of gathering materials.
9. as asphalt mixture for rapid repair of hot-mix-cold-laid pavement as described in the claim 8, it is characterized in that, coarse aggregate is selected basalt for use in described gathering materials, fine aggregate is selected limestone for use, aggregate grading is: corresponding 100% percent of pass of 13.2mm sieve aperture, 9.5mm corresponding 92% percent of pass of sieve aperture, 4.75mm corresponding 67.5% percent of pass of sieve aperture, 2.36mm corresponding 52.5% percent of pass of sieve aperture, corresponding 40% percent of pass of 1.18mm sieve aperture, corresponding 30% percent of pass of 0.6mm sieve aperture, 0.3mm corresponding 23.5% percent of pass of sieve aperture, 0.15mm corresponding 17.5% percent of pass of sieve aperture, corresponding 12.5% percent of pass of 0.075mm sieve aperture, it is the weight percent of benchmark that above-mentioned per-cent is with the gross weight of gathering materials.
10. as asphalt mixture for rapid repair of hot-mix-cold-laid pavement as described in arbitrary claim in the claim 1,2,5,7,9, it is characterized in that described breeze is selected alkaline breeze for use, weight accounts for 10~15% of the gross weight of gathering materials.
CNA2007100442011A 2007-07-25 2007-07-25 Asphalt mixture for rapid repair of hot-mix-cold-laid pavement CN101353481A (en)

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CN101906746A (en) * 2010-07-15 2010-12-08 中煤第三建设(集团)有限责任公司 Method for processing precast cold laid asphaltic concrete material
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CN104326700A (en) * 2014-09-16 2015-02-04 江西省公路科研设计院 Cold laid bituminous mixture for roads and manufacturing method and construction technology thereof
CN104496371A (en) * 2014-12-30 2015-04-08 南通福伦利新材料有限公司 Rapid dehydration curing agent as well as preparation method and application thereof
CN105842027A (en) * 2016-03-23 2016-08-10 武汉理工大学 Preparation method of asphalt mixture sample ultrathin slice for microscopic observation
CN106116269A (en) * 2016-07-07 2016-11-16 沈阳建筑大学 A kind of cold repairing asphalt mixture and preparation method thereof
CN106116270A (en) * 2016-07-07 2016-11-16 沈阳建筑大学 Cold repairing asphalt mixture that a kind of ice period uses and preparation method thereof
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WO2018210069A1 (en) * 2017-05-18 2018-11-22 新疆心路科技有限公司 High viscosity modified asphalt, quick adhesive for roading, preparation method therefor and application method thereof
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